*{
  padding: 0;
  margin: 0;
}
.floatleft{
  float: left;
}
.floatright{
  float: right;
}
.floatclear::after{
  content: "";
  display: block;
  clear: both;
}
.container{
  width: 960px;
  margin: 0 auto;
  text-align: center;

}
.logo{
  width: 200px;
}
.banner1{
  width: 540px;
  margin: 0 10px;
}
.banner2{
  width: 200px;
  
}
.logo,.banner1,.banner2{
  height: 80px;
  background-color: skyblue;
  line-height: 80px;
}
.menu{
  width: 960px;
  height: 30px;
  margin-top: 10px;
  background-color: skyblue;
  line-height: 30px;
}
.content{
  width: 960px;
  margin-top: 10px;
}
.item1{
  height: 198px;
  width: 368px;
  border: 1px solid black;
  margin-right: 10px;
  line-height: 198px;
}
.item2{
  height: 198px;
  width: 178px;
  margin-right: 10px;
  border: 1px solid black;
  line-height: 198px;
}
.buttom{
  margin-top: 10px;
}
.item3{
  height: 128px;
  width: 198px;
  border: 1px solid black;
  margin-bottom: 10px;
  line-height:128px ;
}
.down{
  width: 960px;
  height: 60px;
  background-color: gray;
  line-height: 60px;
}